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Reply With Quotevery nice throttle response!!! i'm guessing your talking about the Gen III "vortec" (5.3's,6.0's)? i'm asking about the 5.7 vortec found in 96-98's 1/2ton.
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This is a discussion on what cam profile works best with vortec's? within the Carbureted forums, part of the Performance category; On my vortec headed SBC I use a Comp XR276HR10 installed +4 degrees (224 Int/230 Exh dur @ .050", 110 ...
On my vortec headed SBC I use a Comp XR276HR10 installed +4 degrees (224 Int/230 Exh dur @ .050", 110 lobe sep, .502" Int/ .510" Exh) with Comp magnum 1.52:1 rockers and Comp 26918 springs. I use 36 degrees max timing @ 3000rpm, 15 degree cranking and 10 degree vacuum on manifold for 26 initial. RPM air-gap copy intake, four hole tapered spacer and a Mighty Demon 750cfm annular booster. I see about 9-11" of vacuum at idle and have been very happy with the streetability. With the torque converter locked and the 4L60E in 4th I cruise around 75mph at 2400rpm with 4.10:1 rear gears and 32" tall wheels. The engine is stable and just cruises right along.
http://www.youtube.com/watch?v=HHO1dZRMwwo
The pics posted in the link above are actually from my engine, I used part numbers as printed in a magazine and they were missprints so I ordered and installed the wrong retainers.
very nice throttle response!!! i'm guessing your talking about the Gen III "vortec" (5.3's,6.0's)? i'm asking about the 5.7 vortec found in 96-98's 1/2ton.
Nope, I'm talking about the GenI/II with Vortec heads. The engine in my truck is a 86-95 roller cam block with aftermarket Vortec heads.Originally Posted by 98chevy1
wow my bad. sounds great!!
if intrester i have a comp cam extreme energy 4x4 cam and lifters, mabye 20 hours on it out of my 63 k20, dont remember the specs on it something like 454 lift. 100 bucks plus shipping
and whatever cam you go with a summit tec will help ypu find the springs you need with the stock diameter, 100 bucks for springs retainers and locks, and like 4 hour install time if installed right making sure they are shimed to the right spring height, and regrind your valves
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